You can see why Canada would want to lessen its dependence on America, which bought 75.5% of its exported goods last year and provided 63.4% of its imported ones.

加拿大想减少对美国的依赖可以理解，加拿大去年75.5%的出口货物销往美国，进口的63.4%来自美国。

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This is why Canada began seriously recovering from its recession almost two years ago.

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Sally Pipes is president of the Pacific Research Institute and the author of Miracle Cure: How to Solve America's Health Care Crisis and Why Canada Isn't the Answer.

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That explains why, among rich countries, Spain, Greece, Italy and Belgium have some of the largest grey economies and why America, Canada and Switzerland have much smaller ones.

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